package com.lzhpo.admin.controller.sys;


import com.lzhpo.common.config.MyEndpointConfigure;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;


@Slf4j
@Component
@ServerEndpoint(value = "/productWebSocket/{sid}", configurator = MyEndpointConfigure.class)
public class WebSocketServer {


    private static int onlineCount = 0;
    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>();

    private static Map<String,Session> webSocketMap = new ConcurrentHashMap<>();

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    //接收sid
    private String sid="";


    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session,@PathParam("sid") String sid) {
        log.info("有新的客户端连接了: {}  sid is {}", session.getId(),sid);
        //将新用户存入在线的组
        webSocketMap.put(session.getId(), session);
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose(Session session) {
        log.info("有用户断开了, id为:{}", session.getId());
        //将掉线的用户移除在线的组里
        webSocketMap.remove(session.getId());
    }

    /**
     * 收到客户端消息后调用的方法
     * @param message 客户端发送过来的消息*/
    @OnMessage
    public void onMessage(String message, Session session) {
        System.out.println("收到来自窗口"+sid+"的信息:"+message);
//群发消息
        for (WebSocketServer item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     *
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        error.printStackTrace();
    }
    /**
     * 实现服务器主动推送
     */
    public void sendMessage(String message) throws IOException {
        this.session.getBasicRemote().sendText(message);
    }


    /**
     * 群发自定义消息
     * */
    public static void sendInfo(String message,@PathParam("sid") String sid) throws IOException {
        //System.out.println("推送消息到窗口"+sid+"，推送内容:"+message);
        for (Map.Entry<String, Session> sessionEntry : webSocketMap.entrySet()) {
            sessionEntry.getValue().getAsyncRemote().sendText(message);
        }
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }


}
